/**
 * 函数参数
 * 函数返回值
 */
function play(num1:number,num2:number){

}
play(123,1)

// "false"
function play2(bool:boolean){
    if(bool){

    }
}
play2(JSON.parse("false"))

function play3(...args:Array<number>){

}

play3(1,2,3,4)

function play4(params1:number,params2:number):string[]{
    return [""]
}
const value = play4(1,3)

new Date().getTime()

const arrow = (age:number):number=>{
    return age * 2
}

